// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2013 Facebook. All rights reserved.
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*/
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#include <linux/types.h>
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#include "btrfs-tests.h"
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#include "../ctree.h"
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#include "../transaction.h"
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#include "../disk-io.h"
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#include "../qgroup.h"
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#include "../backref.h"
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static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
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u64 num_bytes, u64 parent, u64 root_objectid)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_extent_item *item;
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struct btrfs_extent_inline_ref *iref;
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struct btrfs_tree_block_info *block_info;
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struct btrfs_path *path;
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struct extent_buffer *leaf;
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struct btrfs_key ins;
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u32 size = sizeof(*item) + sizeof(*iref) + sizeof(*block_info);
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int ret;
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btrfs_init_dummy_trans(&trans, NULL);
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ins.objectid = bytenr;
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ins.type = BTRFS_EXTENT_ITEM_KEY;
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ins.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_std_err(TEST_ALLOC_ROOT);
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_insert_empty_item(&trans, root, path, &ins, size);
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if (ret) {
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test_err("couldn't insert ref %d", ret);
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btrfs_free_path(path);
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return ret;
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}
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leaf = path->nodes[0];
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item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
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btrfs_set_extent_refs(leaf, item, 1);
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btrfs_set_extent_generation(leaf, item, 1);
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btrfs_set_extent_flags(leaf, item, BTRFS_EXTENT_FLAG_TREE_BLOCK);
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block_info = (struct btrfs_tree_block_info *)(item + 1);
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btrfs_set_tree_block_level(leaf, block_info, 0);
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iref = (struct btrfs_extent_inline_ref *)(block_info + 1);
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if (parent > 0) {
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btrfs_set_extent_inline_ref_type(leaf, iref,
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BTRFS_SHARED_BLOCK_REF_KEY);
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btrfs_set_extent_inline_ref_offset(leaf, iref, parent);
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} else {
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btrfs_set_extent_inline_ref_type(leaf, iref, BTRFS_TREE_BLOCK_REF_KEY);
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btrfs_set_extent_inline_ref_offset(leaf, iref, root_objectid);
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}
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btrfs_free_path(path);
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return 0;
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}
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static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
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u64 parent, u64 root_objectid)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_extent_item *item;
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struct btrfs_path *path;
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struct btrfs_key key;
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u64 refs;
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int ret;
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btrfs_init_dummy_trans(&trans, NULL);
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key.objectid = bytenr;
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key.type = BTRFS_EXTENT_ITEM_KEY;
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key.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_std_err(TEST_ALLOC_ROOT);
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
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if (ret) {
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test_err("couldn't find extent ref");
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btrfs_free_path(path);
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return ret;
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}
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item = btrfs_item_ptr(path->nodes[0], path->slots[0],
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struct btrfs_extent_item);
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refs = btrfs_extent_refs(path->nodes[0], item);
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btrfs_set_extent_refs(path->nodes[0], item, refs + 1);
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btrfs_release_path(path);
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key.objectid = bytenr;
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if (parent) {
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key.type = BTRFS_SHARED_BLOCK_REF_KEY;
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key.offset = parent;
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} else {
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key.type = BTRFS_TREE_BLOCK_REF_KEY;
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key.offset = root_objectid;
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}
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ret = btrfs_insert_empty_item(&trans, root, path, &key, 0);
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if (ret)
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test_err("failed to insert backref");
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btrfs_free_path(path);
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return ret;
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}
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static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
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u64 num_bytes)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_key key;
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struct btrfs_path *path;
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int ret;
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btrfs_init_dummy_trans(&trans, NULL);
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key.objectid = bytenr;
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key.type = BTRFS_EXTENT_ITEM_KEY;
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key.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_std_err(TEST_ALLOC_ROOT);
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
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if (ret) {
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test_err("didn't find our key %d", ret);
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btrfs_free_path(path);
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return ret;
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}
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btrfs_del_item(&trans, root, path);
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btrfs_free_path(path);
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return 0;
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}
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static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
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u64 num_bytes, u64 parent, u64 root_objectid)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_extent_item *item;
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struct btrfs_path *path;
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struct btrfs_key key;
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u64 refs;
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int ret;
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btrfs_init_dummy_trans(&trans, NULL);
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key.objectid = bytenr;
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key.type = BTRFS_EXTENT_ITEM_KEY;
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key.offset = num_bytes;
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path = btrfs_alloc_path();
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if (!path) {
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test_std_err(TEST_ALLOC_ROOT);
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return -ENOMEM;
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}
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path->leave_spinning = 1;
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ret = btrfs_search_slot(&trans, root, &key, path, 0, 1);
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if (ret) {
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test_err("couldn't find extent ref");
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btrfs_free_path(path);
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return ret;
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}
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item = btrfs_item_ptr(path->nodes[0], path->slots[0],
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struct btrfs_extent_item);
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refs = btrfs_extent_refs(path->nodes[0], item);
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btrfs_set_extent_refs(path->nodes[0], item, refs - 1);
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btrfs_release_path(path);
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key.objectid = bytenr;
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if (parent) {
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key.type = BTRFS_SHARED_BLOCK_REF_KEY;
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key.offset = parent;
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} else {
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key.type = BTRFS_TREE_BLOCK_REF_KEY;
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key.offset = root_objectid;
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}
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ret = btrfs_search_slot(&trans, root, &key, path, -1, 1);
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if (ret) {
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test_err("couldn't find backref %d", ret);
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btrfs_free_path(path);
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return ret;
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}
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btrfs_del_item(&trans, root, path);
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btrfs_free_path(path);
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return ret;
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}
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static int test_no_shared_qgroup(struct btrfs_root *root,
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u32 sectorsize, u32 nodesize)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct ulist *old_roots = NULL;
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struct ulist *new_roots = NULL;
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int ret;
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btrfs_init_dummy_trans(&trans, fs_info);
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test_msg("running qgroup add/remove tests");
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ret = btrfs_create_qgroup(&trans, BTRFS_FS_TREE_OBJECTID);
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if (ret) {
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test_err("couldn't create a qgroup %d", ret);
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return ret;
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}
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/*
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* Since the test trans doesn't have the complicated delayed refs,
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* we can only call btrfs_qgroup_account_extent() directly to test
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* quota.
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*/
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
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false);
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if (ret) {
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
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BTRFS_FS_TREE_OBJECTID);
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if (ret) {
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ulist_free(old_roots);
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return ret;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
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false);
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if (ret) {
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ulist_free(old_roots);
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
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new_roots);
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if (ret) {
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test_err("couldn't account space for a qgroup %d", ret);
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return ret;
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}
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/* btrfs_qgroup_account_extent() always frees the ulists passed to it. */
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old_roots = NULL;
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new_roots = NULL;
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if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
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nodesize, nodesize)) {
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test_err("qgroup counts didn't match expected values");
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return -EINVAL;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
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false);
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if (ret) {
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = remove_extent_item(root, nodesize, nodesize);
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if (ret) {
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ulist_free(old_roots);
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return -EINVAL;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
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false);
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if (ret) {
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ulist_free(old_roots);
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
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new_roots);
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if (ret) {
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test_err("couldn't account space for a qgroup %d", ret);
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return -EINVAL;
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}
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if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID, 0, 0)) {
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test_err("qgroup counts didn't match expected values");
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return -EINVAL;
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}
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return 0;
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}
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/*
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* Add a ref for two different roots to make sure the shared value comes out
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* right, also remove one of the roots and make sure the exclusive count is
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* adjusted properly.
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*/
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static int test_multiple_refs(struct btrfs_root *root,
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u32 sectorsize, u32 nodesize)
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{
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struct btrfs_trans_handle trans;
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct ulist *old_roots = NULL;
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struct ulist *new_roots = NULL;
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int ret;
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btrfs_init_dummy_trans(&trans, fs_info);
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test_msg("running qgroup multiple refs test");
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/*
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* We have BTRFS_FS_TREE_OBJECTID created already from the
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* previous test.
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*/
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ret = btrfs_create_qgroup(&trans, BTRFS_FIRST_FREE_OBJECTID);
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if (ret) {
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test_err("couldn't create a qgroup %d", ret);
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return ret;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
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false);
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if (ret) {
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = insert_normal_tree_ref(root, nodesize, nodesize, 0,
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BTRFS_FS_TREE_OBJECTID);
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if (ret) {
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ulist_free(old_roots);
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return ret;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
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false);
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if (ret) {
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ulist_free(old_roots);
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
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new_roots);
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if (ret) {
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test_err("couldn't account space for a qgroup %d", ret);
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return ret;
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}
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if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
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nodesize, nodesize)) {
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test_err("qgroup counts didn't match expected values");
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return -EINVAL;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
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false);
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if (ret) {
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = add_tree_ref(root, nodesize, nodesize, 0,
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BTRFS_FIRST_FREE_OBJECTID);
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if (ret) {
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ulist_free(old_roots);
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return ret;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
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false);
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if (ret) {
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ulist_free(old_roots);
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
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new_roots);
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if (ret) {
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test_err("couldn't account space for a qgroup %d", ret);
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return ret;
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}
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if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
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nodesize, 0)) {
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test_err("qgroup counts didn't match expected values");
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return -EINVAL;
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}
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if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
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nodesize, 0)) {
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test_err("qgroup counts didn't match expected values");
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return -EINVAL;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots,
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false);
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if (ret) {
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = remove_extent_ref(root, nodesize, nodesize, 0,
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BTRFS_FIRST_FREE_OBJECTID);
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if (ret) {
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ulist_free(old_roots);
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return ret;
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}
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ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots,
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false);
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if (ret) {
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ulist_free(old_roots);
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test_err("couldn't find old roots: %d", ret);
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return ret;
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}
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ret = btrfs_qgroup_account_extent(&trans, nodesize, nodesize, old_roots,
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new_roots);
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if (ret) {
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test_err("couldn't account space for a qgroup %d", ret);
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return ret;
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}
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if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FIRST_FREE_OBJECTID,
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0, 0)) {
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test_err("qgroup counts didn't match expected values");
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return -EINVAL;
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}
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if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
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nodesize, nodesize)) {
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test_err("qgroup counts didn't match expected values");
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return -EINVAL;
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}
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return 0;
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}
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int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
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{
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struct btrfs_fs_info *fs_info = NULL;
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struct btrfs_root *root;
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struct btrfs_root *tmp_root;
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int ret = 0;
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fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
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if (!fs_info) {
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test_std_err(TEST_ALLOC_FS_INFO);
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return -ENOMEM;
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}
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root = btrfs_alloc_dummy_root(fs_info);
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if (IS_ERR(root)) {
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test_std_err(TEST_ALLOC_ROOT);
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ret = PTR_ERR(root);
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goto out;
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}
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/* We are using this root as our extent root */
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root->fs_info->extent_root = root;
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/*
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* Some of the paths we test assume we have a filled out fs_info, so we
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* just need to add the root in there so we don't panic.
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*/
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root->fs_info->tree_root = root;
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root->fs_info->quota_root = root;
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set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags);
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/*
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* Can't use bytenr 0, some things freak out
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* *cough*backref walking code*cough*
|
*/
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root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
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if (IS_ERR(root->node)) {
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test_err("couldn't allocate dummy buffer");
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ret = PTR_ERR(root->node);
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goto out;
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}
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btrfs_set_header_level(root->node, 0);
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btrfs_set_header_nritems(root->node, 0);
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root->alloc_bytenr += 2 * nodesize;
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tmp_root = btrfs_alloc_dummy_root(fs_info);
|
if (IS_ERR(tmp_root)) {
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test_std_err(TEST_ALLOC_ROOT);
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ret = PTR_ERR(tmp_root);
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goto out;
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}
|
|
tmp_root->root_key.objectid = BTRFS_FS_TREE_OBJECTID;
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root->fs_info->fs_root = tmp_root;
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ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
|
if (ret) {
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test_err("couldn't insert fs root %d", ret);
|
goto out;
|
}
|
btrfs_put_root(tmp_root);
|
|
tmp_root = btrfs_alloc_dummy_root(fs_info);
|
if (IS_ERR(tmp_root)) {
|
test_std_err(TEST_ALLOC_ROOT);
|
ret = PTR_ERR(tmp_root);
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goto out;
|
}
|
|
tmp_root->root_key.objectid = BTRFS_FIRST_FREE_OBJECTID;
|
ret = btrfs_insert_fs_root(root->fs_info, tmp_root);
|
if (ret) {
|
test_err("couldn't insert fs root %d", ret);
|
goto out;
|
}
|
btrfs_put_root(tmp_root);
|
|
test_msg("running qgroup tests");
|
ret = test_no_shared_qgroup(root, sectorsize, nodesize);
|
if (ret)
|
goto out;
|
ret = test_multiple_refs(root, sectorsize, nodesize);
|
out:
|
btrfs_free_dummy_root(root);
|
btrfs_free_dummy_fs_info(fs_info);
|
return ret;
|
}
|
